To send bulk emails through Juvo, use the Mailchimp plugin.
The Mailchimp plugin will allow you to select the group of contacts you would like to bulk email and then send their contact details from your Juvo account, directly into your Mailchimp account.
Then log in to mailchimp to create your email and send.
For more information, see this help article https://juvo.zendesk.com/hc/en-us/articles/360042959672-Sending-contacts-to-your-Mailchimp-Account